5.1 track showing only 2 channels

gpac / mp4box.js

JavaScript version of GPAC's MP4Box tool

https://gpac.github.io/mp4box.js/

BSD 3-Clause "New" or "Revised" License

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5.1 track showing only 2 channels #288

Open JesseNReynolds opened 2 years ago

JesseNReynolds commented 2 years ago

I've tried a number of videos with 5.1 audio which show 6 channels of audio in finder and 2 audio channels in the tool. This discrepancy appears in the file tester and in my own attempt at implementing the library.

Linked to Dolby for Developers link because the file is over 10MB http://media.developer.dolby.com/Atmos/MP4/Universe_Fury2.mp4

cconcolato commented 2 years ago

MP4Box.js reports what's indicated at the MP4 container level. For E-AC3, those values are overridden by values in an E-AC3 specific structure that is not yet parsed.